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Subject: [Bug tree-optimization/34027] [4.3 regression] -Os code size nearly doubled
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------- Comment #10 from rguenth at gcc dot gnu dot org  2007-11-12 15:01 -------
of course in the -O2 case I forgot to paste the rest of the fn in, here it is:

        .p2align 4,,7
        .p2align 3
.L5:
        addl    $-1000000000, %eax
        adcl    $-1, %edx
        movl    $1000000000, 8(%esp)
        movl    $0, 12(%esp)
        movl    %eax, (%esp)
        movl    %edx, 4(%esp)
        call    __umoddi3
        leave
        ret

so unfortunately the expanders don't deal with modulus the same way as with
the div/mul sequence.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34027